Sprayer



Nov. 1, 1932. F. A. CUFF ET AL SPRAYER Filed Oct. 8, 1928 3 Sheets-Sheet 1 frwenzjors FRED ACuFF G, W m M. H E/ a WW aw Attorneys Nov. 1, 1932.

F. A. CUFF ET SPRAYER Fil-ed Oct. s, 1928 s Sheets-Sheet 2 I rzvcnbors FRED A. CUF F MAURIGE H. KEATING @fiwl gwv Abbar'r iqys 3?;L' F. A. CUFF ET AL 1,885,332

I SPRAYER Filed 001;. 8, 1928 3 Sheets-Sheet 3 Fig.5. 51g. 6

In renter-5 FRED A. cuF'F I MA UR/GE H. KEA TING Attorneys Patentecl Nov. 1, 1932 UNITED STATES PATSENT, OFFICE FRED A, cUEr AND MAURICE H. KEATINGQ E MINNEAPOLIS, MINNESOTA, As's'IGN nS' tio H. n. HUDSON MANUFACTURING COMPANY, or MINNEAPOLIS, MINNESOTA, A 00R- POR'ATION or MINNESOTA Application filed. October 8, 1928. Serial N O.'/31-1,139. I

This invention relates generally :to improvements in sprayers and has, among its features the utilization of the spray head of the pump cylinder as a means for attaching,

5 and facilitating proper placement of; the liquidsupply tube, and as means for defining a drip chamber between the head and'theend" of the cylinder; 'the'placeme'nt and the backspacing or slanting of a, portion of the head 1 below the spray orifice so thata Straight oil supply tube attached'thereto will be related:

to the supply tank substantially diametrically and will allow the use of the shortest tube.

possible; and the combined functions-of the head, for the above purposes.

The objects, advantages and features of the invention will be set forth in the description of thedrawings forming apart of this application, and in said drawings,

Fig. 1 is a side elevation partly. in section showingone application of the invention to a tank; I

Fig. 2 is an end elevation of Fig. 1 vlewing thedischarge endof the cylinder;

Fig. 3 is a 7 showing a modification in which the delivery end of the cylinder does not project beyond the tank;

' Fig. 4 is an end elevation viewing the discharge end; i

Fig. 5 is a section showing a modification in which the cylinder is provided with a slanting plane surfaced end wall;

Fig. 6 is a section showing a modification in which the delivery end wall of the cylinder is conical;

Fig. 7 is a section showing a modification in which a portion of the end surface of the cylinder abuts and projects within the supply tank; I

Fig. 8 isa section showing a modification inwhich the end wall of the cylinder is at the extreme end of the cylinder and in which the chamber.

' Numeral 1 indicates a pump cylinder and SldG' elevation partly in A section end wall is bent inwardly to provide a drain sPnAYEE projectingbeyond the tank so that the drip:-.

ping Spray will not be deposited upon the tank. There is, however, no intention to be limited to the particular na-nner in which the cylinder is. attached .to the tank. Neverthe-' less the intention is to-claim all details of construction of'all forms of the invention, along with the broader features; The axes of tank and cylinder are Ordinarily substantially perpendicularly. related;

.The orificed end walljof the cylinder, lies at some pointi'nwardly from the extremity.

of-ithe cylinder, or some portion of the end wall is thus positioned. The wall is indicated at 10 and may be considered, a partition. This inward spacing is for the purpose of defining and providing a drain-chamber generally indicated at-ll, disposed between the wall and the open end of the cylinder, thus utilizing a portion-of the cylinder for a catchchamber. Thisgwal-lis orificed' as at '15. Compressed air is forced through the Orifice by inward movementof the piston 3,to create a suction action in a liquid supply tube, to

be described; v

A plate 20 functions to complete-the catchchamber and prevent outward flow of any liquid over the lower edge of the end of the. cylinder, .There is no intention to'be limited to this construction which partly closes the end of the cylinder, or to -its manner of at tachment, but, it will be understood that some means mustbe employed to prevent egress of residual spray liquid, from the catch-cham ber. It is conceivable that the end of the cylinder could .beformed in a manner to accomplish this object. In: order that liquid may drain'into the tank 2, a drain passage 21 is provided, in this instance having: the form-of an opening inthe cylinder. This passage is located adjacent andat the Outer side of-thewall 10 at that portion of thecylinder, nearest the tank. The details of construction'shown are also'claimed., s

The oil tube is indicated at 22 and; in .this; instance, passes looselythrough the drain" passage21 so that its draining function may not bedestroyed,.and'has-its upper end arranged in operative relationto the orifice 15.

' It will be understood that as the air passes,

forcibly through the opening 15, liquid will be entrained upwardly through the tube 22.

A feature of the invention includes the slanting arrangement of the oil tube and its substantially linear form, the objects being to obtain a tube of minimum length, thus reducing friction as well as the length of travel of the liquid, to generally improve the eificiency of the device and somewhat reduce the cost of manufacture. In order to facilitate assembly and provide a convenient attaching point for the tube, so that it may be secured in slanting relation substantially as shown, and so that its intake end may lie adjacent the bottom portion of the tank wall, and rearwardly of a diameter B drawn through the axis of the tank substantially perpendicular to the cylinder axis, a por tion 25 of the wall 10 is bent rearwardly as shown. It will be understood that this arrangement of the tube assures the submergence of the intake end of the tube in the liquid, when the cylinder is pointed upwardly or downwardly, even though the liquid be nearly exhausted. The tube may be at tached in any preferred manner to lie sub stantially in parallel relation, in this instance, to the outer surface of the angular wall portion. The tube may be connected by soldering. The wall 10, see Fig. 5 or the slanting portion 25, see Fig. 1, thus provides a support, as well as a gauge determining the proper angular position of the tube in relation tothe tank.

It will be noted that when the sprayer is resting upon a plane surface indicated by dotted line C, the cylinder will assume an angle to facilitate the draining action through the passage 21, which under these conditions will be at the lowest part of the catch-chamber.

By slanting the wall as at 25, the tube cannot only be materially shortened, but the liquid is delivered at the spraying point, more nearly, in direction of spray, and thus additional efficiency is secured.

In the modification of Figure 3, the wall 30 and its angular portion 31 bear substantially the same relation to the outer open end of the cylinder as in the first form. However in this form the extremity of the cylinder does not project beyond the tank 2, but meets its curved wall substantially in the manner shown. The element 32 is attached substanin outline and has a plain surface throughout its entire area. This is a simple construc- .vide a catch-chamber between the end of the wall and the end of the cylinder, with a passage establishing communication between this pocket and the tank, so that leakage at a point outside 'of the cylinder or beyond the wall in direction of spray, is returned to the supply tank. 1

The form of the invention shown in Fig-' ure is substantially similar to that shown in F igure 3, with the exception thatthe lower outer end of the cylinder projects slightly into the tank. In this form the wall element 50 is shown as a separate piece connected across the outer end of the cylinder, but there is not intention to be limited to this specific construction, inasmuch as the portion of the wall of the tank may be bent downwardly to form this guard, just as this wall may be bent upwardly to produce'the guard or wall of the drain chamber as shown in Figures 3, 5 and 6.

In that embodiment of the invention shown in Figure 8, a portion of the end wall of the cylinder is co -planar with the end of the cylinder, and the lower portion of this wall is bent inwardly as at generally in 'w the manner shown for those forms of the invention illustrated in Figures 1, 3 and 7 to provide the catch-chamber 61..

In all instances the tubes extend loosely through a passage in the wall of the cylinder, which passage'establishes communication be: tween the drain chamber and the tank. This is a valuable feature of the invention, as are those features which permit shortening of the tube, and aid delivery generally in the direction of spray, and which provide a drain chamber by arranging and forming the end wall of the cylinder substantially in the manners set forth.

We claim as our invention:

1. A. tank and a pump cylinder secured thereto with a portion of the pump'cylinder including its end extendinginto the tank, said tank having a lip partially capping the end of said cylinder, and said cylinder having an end wall-spaced from said capping element to form therewith a catch-chamber.

2. A supply tank and a pump cylinder secured thereto, said cylinder having a head having a discharge orifice and a portion below the orifice slanted inwardly away from the end of the cylinder to define a drip chamber between the head and the end of the cylinder, said portion being slanted toward the interior of the tank to form a tube attachment means, a straight tube attached to said I slanted portion and passingthrough the cylinder into the tank, and having one end associated with the discharge orifice so that air forced through said orifice will create suction in the tube, and means closing the end of the cylinder to form one wall of the drip chamber, the top of said means being at a level below the discharge orifice.

3. A supply tank and a pump cylinder secured in tangent relation thereto, said cylinder having a head, that portion of the head which is below the axis of the cylinder being flat and being slanted rearwardly from the Y end of the cylinder and downwardly toward the interior of the tank, a straight tube atthe liquid issues in a direction more nearly parallel with the cylinder axis. 7

In witness whereof, I have hereunto set my hand this 3rd day of Oct, 1928.

v j FRED A. CUFF. In witnes whereof, I have hereunto set my hand this 18th day of September, 1928.

' MAURICE I-I. KEATING.

tached to said slanted portion and passing through the cylinder into the tank, and having one end associated with the discharge orifice so that air forced through said orifice will create suction in the tube, and the fiat portion of the head beingso, disposed and slanted that the straight tube is disposed in substantially diametric relation to the tank axis and so that it crosses a line drawn through the tank axis perpendicular to, the axis'oit' the pump cylinder.

4. A supply tank having a pump cylinder I secured thereto in substantially tangential relation, said cylinder having an end wall adjacent the tank, and said wall having a discharge orifice, and said end wall having that portion which is below the orifice flattened and slanted'downwardly and inwardly toward the tank, making an angle of substantially sixty degrees with the cylinder axis and so disposed that an extension of its plane surface is substantially diametrically related to the tank axis, and a straight tube attached to said slanted portion and passing into the tank, said tube having one end associated with the discharge orifice so that air forced through said orifice will create suctionin the tube.

' 5. A supply tank having a pump cylinder secured thereto in substantially tangential to the tank axis, and a straight tube attached 1 to said slanted portion passing only through the cylinder into the tank, substantialy in diametric relation to the tank axis, said tube having one end associated with the discharge orifice so that air forced through said orifice will create suction in the tube, and so that 

